Poly aluminium-silicate compositions and processes for producing the same
AssigneeBollerup Jensen A/S
InventorsMichael Østerby, Bent Larsen
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Abstract
The present invention relates to an improved poly aluminium-silicate composite composition, an improved method for preparing said composition as well intermediate poly silicate and aluminium-silicate compositions and their preparation. Moreover, the present invention relates to the use of a said poly aluminium-silicate composition as a coagulant in purification of water, such as drinking water or waste water.
Claims27
A liquid poly aluminium-silicate chloride (PASC) composition comprising:
- 0.025-1 M silicium (Si);
- 0.05-2.0 M aluminium (Al);
- an Al/Si molar ratio in the range of 2-20;
- and
- a pH in the range of 10-14.
2-41. (canceled)
A liquid poly aluminum-silicate chloride (PASC) composition comprising:
- 0.15-1.5 M silicon (Si);
- 0.3-3.0 M aluminium (Al);
- having an Al/Si molar ratio in the range of 2 to 20;
- and
- a pH in the range of 0 to 3.
A liquid poly silicate composition comprising:
- 0.5-2.0 M silicon (Si);
- and
- having a pH in the range of 0 to 3.
A process for preparing a liquid poly silicate composition, the process comprising:
- a) providing a silicate solution having a concentration of silicon in the range of 0.7-1.9M,
- b) lowering the pH of said silicate solution by a gaseous acid to a pH in the range of 0 to 3, and
- c) providing a liquid poly silicate composition comprising 0.5-2.0 M Si and having a pH in the range of 0 to 3.
Dependencies are inferred from the claim text.